Water heater



FIG. 1 is a top, left rear perspective view of the water heater of thepresent invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing is for illustrative purposes only and forms nopart of the claimed design.

The ornamental design for a water heater, as shown and described.